Mike Rambour wrote:
I am configuring a new machine and I can't get it to work. I
am
using Core1, all the patches and Postfix. I am trying to use my
Linux box as a outgoing mail server from home and not use my ISP's
SMTP, I can send mail from the Linux machine but not from my home
machines (another Linux for me and Windows for my wife and daughter).
See my inserts below...
the output of nmap is (From work to home not the same net) says
smtp is Closed but I cant figure out why:
PORT STATE SERVICE
21/tcp open ftp
22/tcp open ssh
25/tcp closed smtp
80/tcp open http
my iptables looks like this
ACCEPT all -- anywhere anywhere state
RELATED,ESTABLISHED
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:smtp
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:http
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:ftp
ACCEPT tcp -- anywhere anywhere state NEW
tcp dpt:ssh
REJECT all -- anywhere anywhere
reject-with icmp-host-prohibi
I am using postfix and ps output says
root 1735 0.0 0.4 7140 620 ? S Apr14 0:00
sendmail: accepting connections
smmsp 1744 0.0 0.3 7316 412 ? S Apr14 0:00
sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue
Based on the above ps output, your running sendmail, not postfix. Sendmail,
by default, is configured to only listen on localhost. If your wanting to
use postfix as your MTA, then please run "redhat-switch-mail" to configure
the proper links in /etc/alternatives.
I am guessing my problem is smtp being closed according to nmap. I
did not install telnetd. On the linux machine, I can do telnet
localhost 25 and get into mail but I can not do telnet external_ip 25
gives me a connection refused as well as from the Windows machines.
Those of you who are regulars on this list know I am a newbie but
I have looked everywhere I can think of and even purchased "Postfix,
the definitive guide" with no luck.
Actually having postfix running on your box should help with the above. :-)
This is the killer for me, I even did "service iptables stop" and
it still did not work with the firewall turned off. I am not sure
where to look now. At my work machine as was suggested by someone
here on this list, I installed shorewall and I was going to do that
here at home but since iptables stop didnt help, I dont think
shorewall would help either.
My configuration by the way is that the linux box is behind a
Linksys router so the machine has a 192.168.1.30 address and is on my
network. I have tried removing the Linksys and putting the Linux box
directly on the net and on the linksys with the Linux IP in the DMZ
and also just forwarding the ports...all 3 configurations gave the
same result, port 25 closed.
You will still need to configure your linksys box to forward port 25 to your
linux box after you fix the above problems.
Steve Cowles